Writer/environmental warrior Alex Shoumatoff booked his wife and kids into a Russian River motel Saturday, then drove off to join the merry men inside the Bohemian Grove.

But the New Yorker wasn’t invited, not hardly. Shoumatoff is working on a Vanity Fair story critical of attempts by the Bohemian Club to clear some trees from the gorgeous, 2,700-acre camp near Monte Rio alive right now with the midsummer gathering often called the greatest men’s party on Earth.

At about 8 p.m., he sneaked into the tightly guarded Grove. When security men confronted him about 90 minutes later, he was asking questions that made Bohemians wonder if he was truly one of them.

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Shoumatoff was straight-up with the Sonoma County deputies who arrested him on suspicion of trespassing. He told them he entered the Grove to investigate “how the redwood trees are impacted by the members in the Bohemian Grove.”

Deputies contacted his wife to say he was out of the grove and in the county jail. She wasn’t surprised.